Rearrangement Reactions; 14:Synthesis of Functionalized Thiazoles via Attack of Heteroatom Nucleophiles on Allenyl Isothiocyanates
作者:Klaus Banert、Baker Jawabrah Al-Hourani、Stefan Groth、Kai Vrobel
DOI:10.1055/s-2005-872203
日期:——
Treatment of allenyl isothiocyanates with sulfur-, oxygen-, nitrogen- or hydride-containing nucleophiles such as propane-2-thiol, thiophenol, hydrogen sulfide, alcohols, phenol or aqueous NaOH, NH3, primary or secondary aliphatic or aromatic amines, N,N,N′,N′-tetramethylguanidine or sodium cyanoborohydride resulted in ring closure to generate thiazoles bearing a functionality at position C-2 in most cases. Moreover, we report the first examples of aromatic thiazole-2-phosphonates prepared by the same strategy using dialkyl or diphenyl phosphites as nucleophiles.
用含硫、氧、氮或氢化物的亲核物(如丙烷-2-硫醇、噻吩酚、硫化氢、醇、酚或 NaOH、NH3、N,N,N′,N′-四甲基胍或氰基硼氢化钠等含氢化物的亲核剂,在大多数情况下会导致环闭合,生成在 C-2 位具有官能团的噻唑。此外,我们还首次报道了以二烷基或二苯基膦酸盐为亲核剂,通过相同策略制备芳香族噻唑-2-膦酸盐的实例。